Click on calculator and do the following to compute the mean and

Click on calculator *
You may have to set the calculator to scientific mode by clicking on the VIEW tab as it might be
set to standard mode.
The do the following to enter the data in order to compute the mean and the standard deviation:
1. Enter your first data value.
2. Click Sta, and then click Dat.
3. Enter the rest of the data, clicking Dat after each entry.
4. Click the Ave button to calculate the mean, click the s button to calculate the standard
*This link works for Windows XP only